Carrier WeatherMaster 50HC14 Installation Instructions Manual
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Carrier WeatherMaster 50HC14 Installation Instructions Manual

Carrier WeatherMaster 50HC14 Installation Instructions Manual

Single package rooftop cooling only unit with puron (r-410a) refrigerant
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50HC units for installation in the United States contain use of Carrier's Staged Air Volume (SAV™) 2-speed
indoor fan control system. This complies with the U.S. Department of Energy (DOE) efficiency standard of
2018.
50HC units for installation outside the United States may or may not contain use of the SAV 2-speed indoor
fan control system as they are not required to comply with the U.S. Department of Energy (DOE) efficiency
standard of 2018.
For specific details on operation of the Carrier SAV 2-speed indoor fan system refer to the Variable
Frequency Drive (VFD) Factory-Installed Option 2-Speed Motor Control Installation, Setup, and
Troubleshooting manual.
CONTENTS
SAFETY CONSIDERATIONS. . . . . . . . . . . . . . . . . . . . 1-6
Rated Indoor Airflow (cfm) . . . . . . . . . . . . . . . . . . . . . . ..2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-63
Jobsite Survey . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Step 1 - Plan for Unit Location . . . . . . . . . . . . . . . . . . 6
Step 3 - Inspect Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Step 4 - Provide Unit Support . . . . . . . . . . . . . . . . . . . 7
Step 5 - Field Fabricate Ductwork. . . . . . . . . . . . . . . 9
Step 6 - Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 9
Ductwork . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 8 - Install Outside Air Hood . . . . . . . . . . . . . . . 11
Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electric Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Single Point Boxes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
®
®
Drive (Factory Option) . . . . . . . . . . . . . . . . . . . . . . . 37
Supply Air Temperature Sensor . . . . . . . . . . . . . . . . . 45
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Economizer Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
RTU Open Control System . . . . . . . . . . . . . . . . . . . . . . 52
Field Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Communication Wiring - Protocols . . . . . . . . . . . . 58
Local Access. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Outdoor Air Enthalpy Control . . . . . . . . . . . . . . . . . . . 60
Smoke Detectors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Step 12 - Install Accessories. . . . . . . . . . . . . . . . . . . 62
Pre-Start and Start-up . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
START-UP CHECKLIST . . . . . . . . . . . . . . . . . CL-1, CL-2
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500157-01
Single Package Rooftop Cooling Only Unit
Installation Instructions
Page
Printed in U.S.A.
Form 50HC-14-02SI
®
with Puron
(R-410A) Refrigerant

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, main-
tenance, or use can cause explosion, fire, electrical shock or
other conditions which may cause personal injury or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The quali-
fied installer or agency must use factory-authorized kits or ac-
cessories when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operations and have a
fire extinguisher available. Read these instructions thoroughly
and follow all warnings or cautions attached to the unit. Con-
sult local building codes and appropriate national electrical
codes (in USA, ANSI/NFPA 70, National Electrical Code
(NEC); in Canada, CSA C22.1) for special requirements.
It is important to recognize safety information. This is the
safety-alert symbol
. When you see this symbol on the unit
and in instructions or manuals, be alert to the potential for per-
sonal injury.
Understand the signal words DANGER, WARNING, CAU-
TION, and NOTE. These words are used with the safety-alert
symbol. DANGER identifies the most serious hazards which
will result in severe personal injury or death. WARNING signi-
fies hazards which could result in personal injury or death.
CAUTION is used to identify unsafe practices, which may re-
sult in minor personal injury or product and property damage.
NOTE is used to highlight suggestions which will result in en-
hanced installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal injury
or death.
Before performing service or maintenance operations on
unit, always turn off main power switch to unit and install
lock(s) and lockout tag(s). Unit may have more than one
power switch.
Pg 1
WeatherMaster
50HC14
WARNING
12-17
Replaces: 50HC-14-01SI
®

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Summary of Contents for Carrier WeatherMaster 50HC14

  • Page 1: Table Of Contents

    Puron (R-410A) Refrigerant Installation Instructions 50HC units for installation in the United States contain use of Carrier's Staged Air Volume (SAV™) 2-speed indoor fan control system. This complies with the U.S. Department of Energy (DOE) efficiency standard of 2018.

  • Page 2: Rated Indoor Airflow (Cfm)

    WARNING CAUTION UNIT OPERATION AND SAFETY HAZARD CUT HAZARD Failure to follow this warning could cause personal injury, Failure to follow this caution may result in personal injury. death and/or equipment damage. Sheet metal parts may have sharp edges or burrs. Use care Puron ®...
  • Page 3 Position: 10 11 12 13 14 15 16 17 18 Example: Unit Heat Type Factory Assigned 50 - Electric Heat 0 = Standard Packaged Rooftop 1 = LTL ® Model Series - WeatherMaster Electrical Options HC - High Efficiency A = None B = HACR Breaker C = Non-Fused Disconnect Heat Options...
  • Page 4 Fig. 2 — Unit Dimensional Drawing — 14 Size Unit...
  • Page 5 Fig. 2 — Unit Dimensional Drawing — 14 Size Unit (cont)

  • Page 6: Installation

    LOCATION DIMENSION CONDITION 48-in. (1219 mm) Unit disconnect is mounted on panel 18-in. (457 mm) No disconnect, convenience outlet option 18-in. (457 mm) Recommended service clearance 12-in. (305 mm) Minimum clearance 42-in. (1067 mm) Surface behind servicer is grounded (e.g., metal, masonry wall) 36-in.

  • Page 7: Step 3 - Inspect Unit

    CURB-MOUNTED INSTALLATION FRAME-MOUNTED INSTALLATION — Frame-mount- ed applications generally follow the sequence for a curb instal- Install curb lation. Adapt as required to suit specific installation plan. Install field-fabricated ductwork inside curb Inspect unit for transporta- Step 3 — Inspect Unit — Install accessory thru-base service connection package (af- tion damage.
  • Page 8 Fig. 4 — Roof Curb Details...

  • Page 9: Step 5 - Field Fabricate Ductwork

    Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes. Ducts passing through unconditioned spaces must be insu- lated and covered with a vapor barrier. If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applica- ble fire codes.
  • Page 10 PLACE ALL SEAL STRIP IN PLACE BEFORE PLACING UNIT ON ROOF CURB. 36" - 54" “B” (914 - 1371) “C” DUCT END DETAIL “A” “A” SEE DETAIL “A” DIMENSIONS WEIGHT UNIT 50HC**14 2105 116.0 2945 62.5 1590 59.5 1510 NOTES: 1.

  • Page 11: Step 7 - Convert To Horizontal And Connect

    Step 7 — Convert to Horizontal and Connect Unit is shipped in the Ductwork (When Required) — vertical duct configuration. Unit without factory-installed economizer or return air smoke detector option may be field- converted to horizontal ducted configuration using accessory CRDUCTCV002A00.
  • Page 12 5. If removed, reattach the panel under the damper. SIDE PANEL Hood Parts RAIN DEFLECTORS Plastic Tie Wrap PANEL CAULK Qty (2) HERE INDOOR INDOOR COIL COIL ACCESS ACCESS PANEL PANEL Screws for Metal Tray Qty (2) Fig. 13 — Indoor Coil Access Panel Relocation Fig.

  • Page 13: Step 9 - Install External Condensate Trap And Line

    Step 9 — Install External Condensate Trap Step 10 — Make Electrical Connections The unit has one -in. condensate drain con- and Line — nection on the end of the condensate pan and an alternate con- nection on the bottom. See Fig. 16. Unit airflow configuration WARNING does not determine which drain connection to use.
  • Page 14 Fig. 19 — Conduit into Control Box Fig. 22 — Mounting Position for Field Disconnects (up to 100A) Field power wires are connected to the unit at line-side pres- sure lugs at the main terminal block (TB1) or at factory- installed option non-fused disconnect switch or HACR, or field or factory-installed Single Point box for electric heat.
  • Page 15 Units Without Single Point Box, Disconnect or HACR Option WARNING FIRE HAZARD Equip GR Lug Failure to follow this warning could result in personal injury, death, or property damage intermittent operation or performance satisfaction. Do not connect aluminum wire between disconnect switch and air conditioning unit.
  • Page 16 Such operation would invalidate Fig. 25 — Location of Non-Fused Disconnect any applicable Carrier warranty. Enclosure NOTE: Check all factory and field electrical connections for To field install the NFD shaft and handle: tightness.
  • Page 17 6. Tighten the locking screw to secure the shaft to the HACR. 7. Turn the handle to the OFF position with red arrow point- ing at OFF. 8. Install the handle on to the painted cover horizontally with the red arrow pointing to the left. 9.
  • Page 18 NOTICE/AVIS Pwd-CO Fuse Convenience Outlet Utilization Switch Maximum Intermittent Use 15 - Amps Maximum Continuous Use 8 - Amps Observe a 50% limit on the circuit Loading above 8 - Amps Utilisation de la prise utilitaire Usage intermittent maximum 15 - Amps Usage continu maximum 8 - Amps Observez une limite de 50% sur le circuit Chargement au-dessus de 8 - Amps...
  • Page 19 ed due its depth; it must be installed at unit installation. For shipment, the convenience outlet is covered with a blank cover plate. The weatherproof cover kit is shipped in the unit’s control box. The kit includes the hinged cover, a backing plate and gas- ket.
  • Page 20 (available as factory-installed option or as field-installed acces- the box. Using a connector at the control box to protect the sory, for use on a Carrier Comfort Network ® or as a stand alone wire as it passes into the control box.

  • Page 21: Electric Heaters

    SINGLE HEATER MANUAL RESET POINT BOX COVERS LIMIT SWITCH DISCONNECT MOUNTING LOCATION SINGLE POINT HEATER HEATER HEATER MODULE MODULE MOUNTING MOUNTING (LOCATION 1) (LOCATION 2) BRACKET SCREW Fig. 38 — Typical Component Location HEAT ANTICIPATOR SETTINGS — Set heat anticipator Point Box installation instructions for details on tap connec- settings at 0.14 amp for the first stage and 0.14 amp for second- tions for field installed electric heat accessory.

  • Page 22: Humidi-Mizer

    TB4 do allow a switch to be in- nuts. Refer to the installation instructions included with stalled in series with some of the heaters in order to add addi- the Carrier Edge Pro Thermidistat device for more infor- tional heater control. See Fig. 41. mation.
  • Page 23 ® Fig. 44 — Typical Humidi-MiZer Adaptive Dehumidification System Humidistat Wiring...

  • Page 24: Economi$Er

    Edge Programable Thermostat Unit CTB THERMOSTAT O/W2/B SRTN Humidi-MiZer™ FIOP *Connection not required. Fig. 45 — Typical Rooftop Unit with Humidi-MiZer Adaptive Dehumidification System with Edge ® Pro Thermidistat Device sensor loses communications after it has been detected, the ® EconoMi$er X (Factory-Installed Option) W7220 economizer controller indicates a device fail error on...
  • Page 25 Relay Digital Output Rating at 30 Vac (maximum power ECONOMIZER MODULE WIRING DETAILS — Use from Class 2 input only) — 1.5A run: Fig. 47 and Tables 3 and 4 to locate the wiring terminals for the Economizer module. 3.5A inrush at 0.45PF (200,000 cycles) or NOTE: The four terminal blocks are removable.
  • Page 26 Table 4 — Economizer Module - Right Hand Table 5 — HH57AC081 Sensor Wiring Terminal Blocks Terminations LABEL TYPE DESCRIPTION TERMINAL TYPE DESCRIPTION Top Right Terminal Blocks NUMBER LABEL AUX2 I 24 vac IN The first terminal is not used. S-BUS Communications S-BUS...
  • Page 27 • Press the (Enter) button to display the first item in the 10. Press the (Menu Up/Exit) button to return to the previous currently displayed menu. menu. MENU STRUCTURE — Table 7 illustrates the complete hi- erarchy of menus and parameters for the EconoMi$er ®...
  • Page 28 Table 7 — Menu Structure PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT FIRST STAGE COOLING DEMAND (Y1–IN) ECONO AVAIL YES/NO YES = economizing available; the system can use outside air for free cooling when required FIRST STAGE COOLING RELAY OUTPUT ECONOMIZING YES/NO YES = outside air being used for 1 stage cooling...
  • Page 29 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT ACT COUNT 1 to 65535 Displays number of times actuator has cycled. 1 cycles equals 180 deg. of actuator movement in any direction. ACTUATOR OK/Alarm (on Alarm Displays ERROR if voltage or torque is below actuator range.
  • Page 30 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT INSTALL 01/01/10 Display order = MM/DD/YY Setting order = DD, MM, then YY. UNITS DEG F or C Sets economizer controller in degrees Fahrenheit or Celsius EQUIPMENT CONV Conventional or HP...
  • Page 31 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT MAT T CAL 0.0°F ±2.5 F SUPPLY AIR TEMPERATURE CALIBRATION Allows for the operator to adjust for an out of calibration temperature sensor. OAS T CAL 0.0°F ±2.5 F OUTSIDE AIR TEMPERATURE CALIBRATION...
  • Page 32 Table 7 — Menu Structure (cont) PARAMETER PARAMETER MENU PARAMETER DEFAULT RANGE AND NOTES VALUE INCREMENT SHUTDOWN ACTIVE AUX2 IN is programmed for SHUTDOWN and 24 V has been applied to AUX2 IN terminal. DMP CAL RUNNING DAMPER CALIBRATION ROUTINE RUNNING If DCV Auto enable has been programmed, when the W7220 is complet- ing a calibration on the dampers, this alarm will display.
  • Page 33 Table 8 — Damper Minimum Position Settings and Readings on Checkout Menu DEMAND CONTROLLED VENTILATION FAN SPEED SETPOINTS CHECKOUT SENSOR) MIN POS VMAX–HS MIN POS H VMAX–HS MIN POS L VMAX–LS VENT MIN VMAX–HS VENT MAX VMAX–HS VENT MIN H VMAX–HS VENT MAX H VMAX–LS...
  • Page 34 Table 11 — Enthalpy Operation No DCV (CO Sensor) — 1 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE HIGH 0v/Off 0v/Off MIN POS Closed NONE HIGH 24v/On 0v/Off MIN POS Closed HIGH 24v/On...
  • Page 35 Table 14 — Dry Bulb Operation With DCV (CO Sensor) — 2 Speed Fan DEMAND OUTSIDE AIR CONTROLLED GOOD TO Y1-I Y2-I Y1-O Y2-O OCCUPIED UNOCCUPIED SPEED VENTILATION (DCV) ECONOMIZE 0v/Off 0v/Off VENTMIN Closed 24v/On 0v/Off VENTMIN Closed HIGH 24v/On 24v/On VENTMIN Closed...
  • Page 36 ECONOMIZING DUAL ENTHALPY AVAILABLE HIGH LIMIT NOT AVAILABLE SINGLE ENTHALPY P2 (T,RH) (T,RH) TEMPERATURE Fig. 51 — Single Enthalpy Curve Boundaries Table 17 — Single Enthalpy and Dual Enthalpy High Limit Curves POINT P1 POINT P2 ENTHALPY TEMP. DRY TEMP. ENTHALPY HUMIDITY HUMIDITY...

  • Page 37: Low Ambient Control (Factory Option)

    TROUBLESHOOTING Alarms — The economizer module provides alarm messages WARNING that display on the 2-line LCD. Failure to follow this warning could result in personal NOTE: Upon power up, the module waits 60 minutes before injury, property damage, or death. checking for alarms.
  • Page 38 Fig. 52 — 50HC14 Control Box Component Locations with ComfortLink Controls...
  • Page 39 Fig. 53 — 50HC14 ComfortLink Control Wiring Diagram...
  • Page 40 Fig. 54 — 50HC14 ComfortLink Power Wiring Diagram...
  • Page 41 ® Fig. 55 — 50HC14 ComfortLink with Humidi-MiZer Power Wiring Diagram...

  • Page 42: Premierlink Controller (Factory Option)

    FIOP/accessory EconoMi$er 2 package. unit control board. CCN service access tools include System The PremierLink controller requires the use of a Carrier Pilot™, Touch Pilot™ and Service Tool. (Standard tier display electronic thermostat or a CCN connection for time broadcast tools Navigator™...
  • Page 43 Fig. 58 — PremierLink Wiring Schematic...
  • Page 44 ® Fig. 59 — PremierLink™ Wiring Schematic with Humidi-MiZer System Option...

  • Page 45: Supply Air Temperature Sensor

    NOTE: Refer to PremierLink Controller Installation, Start-up, Supply Air Temperature (SAT) Sensor — and Configuration Instructions for complete PremierLink con- FIOP-equipped 50HC**14 units, the unit is supplied with a troller configuration, operating sequences and troubleshooting supply-air temperature (SAT) sensor (33ZCSENSAT). This information.
  • Page 46 Digital, 5VDC AUX OUT(Power Exhaust) (Output) Discrete 24VAC CCN —(BLK) Digital, 5VDC LEGEND — Carrier Comfort Network (communication bus) CMPSAFE — Compressor Safety FILTER — Filter Switch — Fire Shutdown — Indoor Air Quality (CO — Outdoor Air Quality (CO —...
  • Page 47 SPACE SENSORS — The PremierLink™ controller is factory-shipped configured for Space Sensor Mode. A Carrier T-55 or T-56 space sensor must be used. T-55 space tempera- ture sensor provides a signal of space temperature to the Pre- mierLink controller. T-56 provides same space temperature sig- nal plus it allows for adjustment of space temperature setpoints from the face of the sensor by the occupants.

  • Page 48: Economizer Controls

    SPACE THERMOSTAT THERMOSTAT J4-12 J4-10 0-10VDC J4-8 SIG COM 4-20mA J4-6 ALARM RELAY CONTACTS J4-4 H G 24 VAC 24 VDC THERMOSTAT 8 7 6 5 4 3 2 1 Fig. 65 — Space Thermostat Connections If the 50HC**14 unit has an economizer system and free- cooling operation is required, a sensor representing Return Air Temperature must also be connected (field-supplied and in- stalled).
  • Page 49 The sensor must be mounted vertically on the wall. The the air within the occupied space. Carrier logo should be orientated correctly when the sensor is The use of a standard 2 X 4 inch electrical box to accommo- properly mounted.
  • Page 50 Filter Switch (NO, close on rising pressure (high drop)) Thermostat J4-4 Fig. 72 — PremierLink Controller Filter Switch Connection When the filter switch’s NO contact set closes as filter pres- Vin Gnd sure drop increases (indicating dirt-laden filters), the input sig- nal to the PremierLink controller causes the filter status point to read “DIRTY.”...
  • Page 51 TB3-12 terminal. Connect the CCN (ground) lead (typically quired every 1000 ft. WHT) to the unit’s TB3-14 terminal. Connect the CCN (–) NOTE: Carrier device default is 9600 baud. lead (typically BLK) to the unit’s TB3-16 terminal. See Communications Bus Wire Specifications The CCN Fig.

  • Page 52: Rtu Open Control System

    and control through communication with several Building Au- The RTU Open RTU Open Controller System — tomation Systems (BAS) through popular third-party network controller is factory-mounted in the 50HC**14 unit’s main systems. The available network systems are BACnet* MP/TP, control box, to the left of the CTB. See Fig. 78. Factory wiring Modbus†...
  • Page 53 Fig. 78 — RTU Open System Control Wiring Diagram...
  • Page 54 ® Fig. 79 — RTU Open System Control Wiring Diagram with Humidi-MiZer System Option...
  • Page 55 “Run Enable” status. See Input/Output section for additional instruc- tions. The RTU Open controller requires the use of a Carrier space hole in the flange or duct. Use two field-supplied, self-drilling sensor. A standard thermostat cannot be used with the RTU screws to secure the sensor probe in a horizontal orientation.

  • Page 56: Field Connections

    SPACE TEMPERATURE (SPT) SENSORS — There are Fig. 81 — RTU Open Controller T-56 Sensor two types of SPT sensors available from Carrier, resistive input Connections non-communicating (T55, T56, and T59) and Rnet communi- Connect T-59 The T-59 space sensor requires a separate, —...
  • Page 57 Do not mount the IAQ sensor in drafty areas such as near SPACE RELATIVE HUMIDITY SENSOR OR HUMIDI- supply ducts, open windows, fans, or over heat sources. Allow STAT at least 3 ft (0.9 m) between the sensor and any corner. Avoid Humidi-MiZer ®...

  • Page 58: Communication Wiring - Protocols

    Fan Status The fan status accessory is a field-installed ac- — cessory. This accessory detects when the indoor fan is blowing J4-1 or J4-4 + 24 VDC air. When installing this accessory, the unit must be configured SUPPLY VOLTAGE  ...

  • Page 59: Local Access

    SW3 Protocol Selection PROTOCOL Select BACnet MS/TP (Master) Unused Select Baud Baud Select Modbus (Slave) Unused Select Baud Baud N2 (Slave) Unused LonWorks Unused NOTE: DS = Dip Switch BACnet MS/TP SW3 example shown COMM Baud Rate Selections OPTION SET TO PORT SET TO MSTP 38.4k...

  • Page 60: Outdoor Air Enthalpy Control

    Access Port LOCAL ACCESS RNET PORT Connect to +12 DVC Rnet- computer’s Rnet+ CR2032 USB port Connect to UI-10 the Local UI-11 Access port USB Link Kit RTU Open Controller Fig. 90 — PC Running Field Assistant Table 25 — LEDs The LEDs on the RTU Open Control Board (see Fig.

  • Page 61: Smoke Detectors

    DIFFERENTIAL ENTHALPY CONTROL — Differential board may be necessary to complete the unit and smoke detec- enthalpy control is provided by sensing and comparing the out- tor configuration to meet project requirements. side air and return air enthalpy conditions. Install the outdoor Units equipped with factory-optional Return Air smoke de- air enthalpy control as described above.

  • Page 62: Step 11 - Adjust Factory-Installed Options

    • Differential enthalpy sensor • Time Guard II compressor anti-cycle control • Outdoor coil protector grille © Carrier Corporation 2017 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500157-01 Printed in U.S.A.

  • Page 63: Start-Up Checklist

    START-UP CHECKLIST (Remove and use for job file) NOTE: To avoid injury to personnel and damage to equipment or property when completing the procedures listed in this start-up checklist, use good judgment, follow safe practices, and adhere to the safety considerations/information as outlined in preceding sec- tions of this Installation Instructions document.
  • Page 64 10. RESTORE SETPOINTS FOR THERMOSTAT AND HUMIDISTAT  REPEAT PROCESS FOR 2 COMPRESSOR SYSTEMS © Carrier Corporation 2017 Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Catalog No. 04-53500157-01 Printed in U.S.A.

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